12
current consumption in the offline mode, maximum:
at power voltage of +12 V
– 60 mA;
at power voltage of +24 V
– 30 mA.
GPIO 1 and 2 in the "input" mode:
resistance of the programmable pullup to power voltage
– 10 kΩ;
Programmable pull-down resistor
– 47 kΩ;
Maximum "0" level voltage (low level)
– 0.8 V;
Minimum "1" level voltage (high level)
– 2.0 V;
maximum allowable input voltage
– 40 V.
GPIO 2 in the “input” mode set as ADC:
Current measurement parameters:
Current measuring range, mA: 0 to 30.
Current measurement error, mA:
0.2.
Voltage measurement parameters:
Voltage measuring range, V: 0 to 40.
Voltage measurement error, V:
0.2.
GPIO 1 and 2 in the "output" mode:
output type
– open collector to ground;
output resistance
– 120 Ω;
maximum output current
– 10 мА.
GPO 3 in the "output" mode:
output type
– open collector to power voltage;
output resistance
– max2 Ω;
maximum output current
– 500 мА.
2.7. GSM Module Specifications
Bandwidth:
900/1800 MHz;
900/2100 MHz.
2.8. Device Functional Circuit
The modem main components:
power connector;